PURPOSE:To store plural dial numbers by which automatic dialing is attained through redialing. CONSTITUTION:The system is provided with a dial information storage memory 51 storing plural dial numbers for each extension terminal equipment 10 and a counter memory 52 designating an area location in the dial information storage memory 51 storing a received dial number, the dialed number is registered by a button operation of a registration request, a counter is advanced by one with respect to a position number storing the dial number, the dial information stored in the storage memory 51 is called by the button operation of the call request and displayed on a display section 11 of the extension terminal equipment 10. When one of the dial information sets displayed is designated by the button operation, the designated dial information is used for redialing for call connection.